Shifting apparatus



(No Model.)

' A CHAVANNE SHII'TING APPARATUS.

Patented Nov. 3,

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- UNITED STATES PATENT OFFICE.

ANDRE CHAVANNE, OF GRASS VALLEY, CALIFORNIA.

SHIFTING APPARATUS.

SPECIFICATION forming part of Letters rPatent No. 570,623dated November 3, 1896.

Application filed March 11i l396 To all whom it may concern.-

Be it known that LANDRE CHAvANNE,a citizen of the United States, residing at Grass Valley, county of Nevada, State of California, have invented an Improvement in Shifting Apparatus for Machinery Requiring Variable Strokes; and I hereby declare the following to be a full, clear, and exact description of the same.

My invention relates to mechanism for producing variable strokes adapted for all machinery requiring it, as, for example, as I have herein illustrated, pumping machinery, though I do not confine myself to such.

My invention has for its object the provi'- sion of a simple, practical, and easily-ad-4 j usted mechanism or apparatus adapted to take power from any suitable source, as, for example, a main pumping-rod, and to reduce or increase the transmitted motion to suit the, strokes of other machines, such, for example, as pumps at a lower level.

My invention consists in the novel construction, arrangement, and combination of parts which I shall hereinafter fully describe and claim. P* Referring to the accompanying drawings, Figure l is an elevation of my shifting apparatus, showing it adapted to reduce the trans: mitted motion to a two-foot stroke. Fig. 2 is an elevation showing the same adapted for a three-foot stroke; Fig. 3, for a four-foot stroke; Fig. 4, for a five-foot stroke, and Fig. 5 is a plan showing it adapted for the full stroke of six feet..

Similar letters in all the figures indicate similar parts.

A is a shaft which slides freely in pillowblocks B B', bolted to a frame or base-plate C.

D represents, for the sake of illustration, a

main pump-rod, from which the power is to be taken, and to this rod the frame C is bolted.

Upon the shaft A, at a suitable point between the pillow-blocks, is formed or secured` rigidly a collar or stop a, on each side of which and encircling the shaftA is a spring, one being designated by F and the other by F2, the former being the upper and the latter the lower spring.

The lower end of shaft Avis suitably connected, as by means of the straps m, with the Serial No. 582,818. (No model.)

rod H of a pump supposed to be below, say at a lower level.

Now, referring to Fig. l, the main rod D is supposed to be at the upper limit of its stroke. When, now, the rod D moves down, the pillow-blocks B and B will at first simply slip over the shaft A, which will remain immovable, and if we suppose the rod D to have a six-foot stroke Fig. l shows that it will move, say, four feet of its stroke before the upper pillow-block B will have by contact with the upper v'spring F compressed it to the point as', at which point it will begin to pick up shaft A and so will move said shaft throughout the remainder of its stroke, that is to say, two feet to the point x2. In this operation the lower pillow-block B leaves the lower spring F2, which thereupon opens. Now on the upstroke of rod D the reverse takes place-that is to say, said rod will move up, say, four feet before the lower pillow-block B wilgendense spring F? and begin to carry shaft A up to its return limit of two feet.

Now, referring to Fig. 2, it will be seen that by bolting a tappet E of proper length to the- Likewise in Fig. 3,l

means of a third tappet, a five-foot stroke may r be had. Y

Fig. 6 shows the manner in which the shaft A may be given the full six-foot stroke of the main rod D. There is ,a bracket K, shown in all the figures and having a cross-groove or keyway p' in it. A removable and replaceable lat key p, Fig. 5, is passed into this way, and thus lies immediately over the end of shaft A. This locks the shaft A and rod D together by preventing the end of the shaft working through the pillow-block, so that said rod takes the shaft with it from the very beginning of the stroke and carries it through the full stroke.

The points designated by and y repre- IOO sent the full distance between pillow-blocks v on frame C. The points y and y2 show the length of communicated stroke, and the letters c indicate stop-plates riveted on theends of frame 'C vbehind the pillow-blocks.

l-laving thus described my invention, what l claim as new, and desire to secure byLetters Patent, is-

l. A shifting or transmitting mechanism comprising a shaft connected with and adapted to operate the device to which the s troke is to be transmitted, a separate reciprocating rod adapted to operate another device, and from which thestroke is to be taken, guides upon said rod through which the shaft slides freely, a collar or stop on the' shaft at a point between the guides and shorter than the distance by which they are separated, and springs on the shaft, one on each side of the collar or stop and lying in the paths of movement of and adapted to be contacted by said guides.

2. A shifting or transmitting mechanism comprising a shaft connected with and adapted to operate the device to which the stroke is to be transmitted, a separate reciprocating rod adapted to operate another device, and from which the stroke is to be taken, guides upon said rod through which the shaft slides freely, a collar or stop on the shaft at a point between the guides and shorter than the distance by which they are separated, springs on the shaft, one on each side of the collar or stop and lying in the paths of move-V ment of and adapted to be contacted by said guides, and removable tappets to be fitted to said collar -or stop, to `vary its length and thereby to vary the length of the transmitted stroke. Y

3. A shifting or transmitting mechanism comprising a shaft connected with and adapted to operate the device to which the stroke is to be transmitted, a separate recip-A rocating rod adapted to operate another device, andfrom which the stroke is to be taken, guides upon said rod through which the shaft slides freely, a collar or stop on the shaft at apoin-t between and lying in thepat-h of movement yof the guides and removable tappets adapted to be fitted to said collar or stop to vary its length and thereby to vary the length of the .transmitted stroke.

4. A shifting and transmitting mechanism comprising a shaft connected with and adapted `to operate the device to which the stroke is to be transmitted, a separate reciprocating rod adapted to operate .another device, and from'which the stroke is to be taken, separated pillowblocks on said rod in which the -shaft is mounted and adapted. to slide freely, a base-plate or frame to which Athe pillow-.blocks are secured, said plate or frame being secured to the reciprocating rod from which the stroke is to be taken, and .a collar or stop on the shaft at a point between the pillow-blocks and lying in the path of said blocks.

5. A shifting or `transmitting mechanism comprising a shaft connected with and i *mit adapted to operate the device to which the a stroke is to be -transmitted separate reciprocating rod adaptedto operate anotherdevice, and from which the stroke is to be taken, separated pillow-blocks in which the shaft 1s mounted and adapted to slide freely, a baseplate or frame to which the pillow-blocks are secured, said plate or frame being secured to the reciprocating rod from which the stroke is to be taken, a collar o r stop on the shaft at a point between the pillow-blocks and lying in the path of said blocks, and removable tappets adapted to be fitted to said collar or stop, to vary its 'length and thereby to vary' the length of transmitted stroke.

6. A shifting or transmitting mechanism comprising a shaft connected with and adapted to operate the device to which the stroke is to be transmitted, a separate reciprocating rod adapted to operate another device, andfrom which the strokeisto be taken, separated pillow-blocks in which the shaft `1s mounted and adapted'to slide freely, a baseplate or frame to which the pillow-blocks are secured, said plate or frame being secured to the reciprocating rod from which the stroke is to be taken, a collar for stop on the shaftat a point between the pillow-blocks, and springs on the shaft one on each Side of the collar or stop and lying in the paths of movement lof and adapted to be contacted by said pillowblocks.

- 7. A shifting or transmitting mechanism' comprising a shaft connected with and adapted 1 to operate the device to which the stroke is to be transmitted, a-separate reciprocating rod adapted to operate another device, and from which the stroke is to be taken, separated pillow-'blocks in which the shaft 1s mounted and adapted to slide freely, a baseplate or frame to which the pillow-blocks are secured, said plate or fra-me being secured to the reciprocating rod from which the stroke vis to be taken, a collar ,or stop on the shaftata point 'between the pillow-blocks, springs on the shaft one on each side o f the collar or stop .and lying in the paths of movement of and adapted to be vcontacted bysaid pillowblocks, and removable tappets adapted to be fitted to said collar or stop, to vary its length and thereby to vary theilength of transmitted stroke.

8. A shifting or transmitting mechanism comprising a shaft connected with `and adapted to operate the device to which the stroke is to be transmitted, a separate reciprocating rod adapted to operate another device, and from which the stroke is to be taken, separated pillow-blocks in which the shaftgis mounted and adapted to slide freely, a baseroo rio `u plate or frame .to which the pilloW-bloeksare a secured, said plate or frame being secured `to the reciprocating rodfrom which the strokefis to be taken, a collar or stop on theshaft at@ point between 'the zpillowfblocks, :springs l.on

the shaf-tone von each side of the collar er i stop and lying in the paths of movement of are locked together to transmit the full Y and adapted to be contacted by said pillowstroke. IO

blocks, removable tappets adapted to be tted In Witness whereof I have hereunto set my to said collar or stop to vary its length and hand.

thereby to vary the length of transmitted ANDRE CHAVANNE. stroke, and a removable key to prevent the movement of the shaft through the pillowblocks whereby the shaft and movable part lVitnesses:

D. FRIooT, JACOB WEIssBEIN. 

